simpson



' (No Model.)

G. H. SIMPSON.

EVAPORATOR. N5. 455,125. Patented June 30, 1891.

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UNITED STATES FFICE.

ATENT GEORGE H. SIMPSON, OF TERRE HAUTE, INDIANA, ASSIGNOR OF ONE-HALF TO IYILLIAM O. BUNTIN, OF SAME PLACE.

EVAPO RATO R.

SPECIFICATION forming part of Letters Patent N o. 455,125,dated June 30, 1891.

Application filed February 10, 1890. Serial No. 339,944. (No model.)

To all whom it may concern.- 7 Be it known that I, GEORGE H. SIMPSON, a citizen of the United States, residing at Terre Haute, in the county of Vigo and State of In- .diana, have invented certain new and useful Improvements in Evaporators; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form part of this specification.

I This invention relates to certain improvements in evaporators; and it consists in certain novel features of construction and in combinations of parts more fully described hereinaftenand particularly pointed out in the claims.

Referring to the accompanying drawings, Figure 1 is a vertical elevation of the apparatus, showing sectional views of parts when necessary for clearness in description. Fig. 2

2 5 is a plan view of the apparatus. 1

Similar letters refer to similar parts in. both views.

The letter A indicates an evaporator, which consists of a metallic cylindrical chamber a,

0 a convexed dome-like heating-surface b, and a coil of perforated steam-pipe a. At the top of a there is a dome in which there is an inverted funneld. The pipe of thefunnel protrudes from the top of the dome and is con- 5 nected by a supply-pipe p with a retort or supply-reservoir O, situated high above A. The funnel d is covered with a concave strainer 6. Also on one side of the chamber a, near the top, there are a number of air-vents o, and

diametrically opposite to these vents there is an exhaust-pipe w. A fits down upon and is closed by the dome-shaped surface b. Thus b forms a bottom for a, and is arranged so that one side is a little higher than the other, so 5 that the matter deposited thereon will settle on the lower side, where it may be drawn off through the drain-pipe 19 into a retort or receptacle D. The convexed heating-surface b is closed by'a bottom f, shaped so as to conveniently envelop the coil of steam-pipe c.

The process is as follows: Place the liquid, from which it is desired to extract the alcohol or any other volatile or medicinal substances, into the retort or supply-vessel C and allow it to drop through the pipe 1) into the inverted 5 5 funnel d, where it is dashed into a spray by passing through the screen 6. The liquid then falls in a spray upon the surface 12, which is heated by means of the coil of steam-pipe c, and is instantly evaporated in the free air, the vapors being exhausted through to and the residue falling to the bottom of a, where it is drawn off into the catch vessel or reservoir D and recovered.

Any suitable exhausting means (not shown) can be connected with pipe 19 to draw the vapor from the evaporator into a condenser. (Not shown.)

What I claim as my invention, and desire to secure by Letters Patent, is 7o 1. An evaporator consisting of a cylindrical casing having a closed top provided with a dome, a discharge-spreader in said dome, an'air-vent in the side of said cylinder, a vapor-discharge through said casing, and a domeshaped imperforate bottom upon which said casing fits, so as to form a heating-chamber above the bottom, and a discharge from the lowest portion of the chamber formed by said casing and bottom. 8

2. An evaporator comprising the casing having a closed top provided with a discharge into the chamber and a closed imperforate bottom convexed upwardly and centrally into the chamber, air-vents into one side of said 8 chamber, a vapor-discharge from the upper portion of said chamber diametrically opposite said Vents, and a liquid-discharge from said chamber. I

In testimony that I claim the foregoing as my own I affix my signature in presence of two witnesses.

GEO. I -I. SIMPSON.

\Vitnesses:

SAMUEL O. STIMSON, ALVIN M. HIGGINS. 

